Oxidative degradation of polymers. VI. Photooxidation of polystyrene powder and some model compounds.
スポンサーリンク
概要
- 論文の詳細を見る
The rates and products of photooxidation of polystyrene powder were studied at 70 °C under irradiation of a 30W low pressure mercury lamp. It was found that the rate of oxidation is remarkably high but the amount of oxygen incorporated into the polystyrene chain is very small. About a half of the absorbed oxygen appeared as carbon dioxide, independent of the conversion, irradiation time, oxygen pressure, and molecular weight. A trace amount of phenol was detected by GLC. The isotachophoretic analysis showed the formation of formic acid, oxalic acid, and glyoxylic acid. It was found that the mechanism of photooxidation is dependent on the state of the substrate, <I>i.e.</I>, crystalline solid, melt(viscous liquid) or solution. It is concluded that the polystyrene powder is photooxidized from its surface and aromatic ring of polystyrene is cleaved to give carboxylic acids. It was suggested that ozone played an important role in the photooxidation of polystyrene. The conclusions are supported by the results obtained in the photooxidation of some model compouds such as 1,2-diphenylethane, hexamethylbenzene, azobenzene, and phenylazotriphenylmethane.
- 公益社団法人 日本化学会の論文
著者
-
Kamiya Yoshio
Department of Applied Chemistry Faculty of Engineering The University of Tokyo
-
Niki Etsuo
Department of Reaction Chemistry, Faculty of Engineering, The University of Tokyo
-
Kamiya Yoshio
Department of Reaction Chemistry, Faculty of Engineering, The University of Tokyo
-
Shiono Takeo
Department of Reaction Chemistry, Faculty of Engineering, The University of Tokyo
関連論文
- A Change in Gastric Mucosal Ascorbic Acid Status with the Formation, Progression, and Recovery of Compound 48/80-induced Acute Gastric Mucosal Lesions in Rats
- Formation of 2,6-Naphthalenedicarboxylic Acid by the Co-Mn-Br-Catalyzed Autoxidation of 2,6-Diethylnaphthalene in Acetic Acid
- Formation of Benzenecarboxylic Acids from Bituminous Coal by Means of Oxygen-oxidation in Alkaline Medium
- Ozonization of organic compounds. VI. Relative reactivity of protic solvents toward carbonyl oxide.
- Phenolic solvent-assisted hydrogenolysis of trans-stilbene.
- Photoinduced electron transfer oxidation. I. 9,10-Dicyanoanthracene-sensitized photooxidation of hindered phenols.
- Oxidation of lipids. XVII. Crossover effect of tocopherols in the spontaneous oxidation of methyl linoleate.
- Spectrophotometric study on the complex formation of hydroperoxide with tetraphenylporphyrin cobalt(II).
- Interaction of galvinoxyl radical with ascorbic acid, cysteine, and glutathione in homogeneous solution and in aqueous dispersions.
- Ligand effects of 2,2'-bipyridine in the decomposition of 1,2,3,4-tetrahydro-1-naphthyl hydroperoxide catalyzed by cobalt(II) salt.
- Ozonization of organic compounds. VII. Carboxylic acids, alcohols, and carbonyl compounds.
- Ozonization of organic compounds. V. Aromatic compounds.
- The liquid-phase oxidation of methylbenzenes by the cobalt-copper-bromide system.
- Oxidation of lipids. XIII. Antioxidant activities of .ALPHA.-, .BETA.-, .GAMMA.-, and .DELTA.-tocopherols.
- The oxidation of toluene by cobalt-copper-bromide system. A side-chain acetoxylation.
- Oxidation of lipids. XVI. Inhibition of autoxidation of methyl linoleate by diarylamines.
- Oxidation of lipids. I. Quantitative determination of the oxidation of methyl linoleate and methyl linolenate.
- Oxidation of lipids. V. Oxidation of methyl linoleate in aqueous dispersion.
- The Metal-Catalyzed Autoxidation of Cumene
- Oxidative degradation of polymers. V. Ozonization of polypropylene and polystyrene in carbon tetrachloride.
- Oxidation of lipids. XII. Inhibition of oxidation of soybean phosphatidylcholine and methyl linoleate in aqueous dispersions by uric acid.
- Oxidation of lipids. IX. Decomposition of methyl linoleate and methyl linolenate hydroperoxides in solution.
- Oxidation of lipids. XIV Inhibition of oxidation of methyl linoleate by fatty acid esters of L-ascorbic acid.
- Oxidation of lipids. II. Rate of inhibition of oxidation by .ALPHA.-tocopherol and hindered phenols measured by chemiluminescence.
- Oxidation of lipids. VIII. Synergistic inhibition of oxidation of phosphatidylcholine liposome in aqueous dispersion by vitamin E and vitamin C.
- A study of the color of coal liquids. II Involvement of light, oxygen, phenols, and aromatic amines in formation of colored materials from Wandoan-coal-derived liquids.
- The photocycloaddition of 6-substituted phenanthridines to electron-rich olefins.
- Oxidative degradation of polymers. VI. Photooxidation of polystyrene powder and some model compounds.
- Liquid phase disproportionation of propylene over MoO3-Al2O3 catalyst in the presence of solvents.
- Effects of pressure on the disproportionation of olefins over MoO3-Al2O3 and Re2O7-Al2O3 catalysts.
- Disproportionation of propylene over MoO3-SiO2 catalyst with various treatments.
- Reaction of dioxygen complexes with catechols.
- Studies on the liquid phase oxidation of nitroalkylbenzenes catalyzed by transition metal and bromide ions.
- Autoxidation of atactic polypropylene and related alkanes. Rates and reactivities toward peroxy radicals.
- Catalysis of Manganese Salts in the Autoxidation of Cyclohexanone